Manusmriti
यथा यथा हि पुरुषः शास्त्रं समधिगच्छति । तथा तथा विजानाति विज्ञानं चास्य रोचते ॥ २० ॥
For the more a man completely studies the Institutes of science, the more he fully understands (them), and his great learning shines brightly.
english translation
yathA yathA hi puruSaH zAstraM samadhigacchati । tathA tathA vijAnAti vijJAnaM cAsya rocate ॥ 20 ॥
hk transliteration by Sanscript